Add a process to reschedule files in minio

At the moment files, that where not processed by the scheduler/extractor, i.e. when the services are not available, never get a second chance and the content never will get parsed. The only way is to import them again so Minio will publish a "new file event".

We should find a way to query files, that are not parsed (recognizable by the missing scheduler tags) and a way to retrigger their processing.